基于三相输配电联合潮流仿真的电压稳定裕度评估

Voltage stability margin assessment based on three-phase transmission and distribution joint power flow simulation

近年来,由于分布式电源的持续增长及其动态性和间歇性,对电力系统运行产生诸多影响。将输电和配电相结合的综合电网建模方法有助于捕捉配电和输电系统之间的内在联系。本文提出三相输配电结合的联合仿真潮流模型,同时研究了其他联合仿真方法以分析考虑不平衡和多种负荷类型的电网电压抗干扰能力。结果表明,基于三相输配电联合潮流仿真方法可以更准确地计算相电压的稳定裕度,从而提高输配电网络中各相的整体供电稳定性。

In recent years, due to continuous growth of distributed generation with dynamic and intermittent,feature Which has more impacts on the operation of power system. The integrated power grid modelling method combining transmission and distribution helps to establish an internal relationship between distribution and transmission systems. A joint simulation power flow model combining three-phase power transmission and distribution is proposed. Other joint simulation methods are also studied to analyze the anti-interference ability of the power grid voltage with imbalance and various load types in consideration. The results show that the stability margin of phase voltage can be calculated more accurately based on the three-phase power flow simulation method, so as to improve the overall power supply stability of each phase in the transmission and distribution network.